Support exporting Mercator (Spherical) on a sphere as Mercator_1SP in WKT1

[rouault]

Fixes OSGeo/gdal#12891

[mkbarker]

Thanks for the quick response! I was wondering if there was some temporary workaround solution I could use until the next release?

[rouault]

I was wondering if there was some temporary workaround solution I could use until the next release?

use 'PROJCS["Moon (2015) - Sphere / Ocentric / Mercator",GEOGCS["Moon (2015) - Sphere / Ocentric",DATUM["Moon (2015) - Sphere",SPHEROID["Moon (2015) - Sphere",1737400,0,AUTHORITY["IAU","30100"]],AUTHORITY["IAU","30100"]],PRIMEM["Reference Meridian",0,AUTHORITY["IAU","30100"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["IAU","30100"]],PROJECTION["Mercator_1SP"],PARAMETER["central_meridian",0],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["IAU","30190"]]' as the value of -t_srs

[mkbarker]

Great, thank you!